From ticket scalpers to terrorism, football's biggest game always presents challenges large and small for law enforcement officials.

Their task is made more difficult by the location of Super Bowl 50, some 45 miles from downtown San Francisco, and a number of events throughout the sprawling Bay Area in the run up to the game in Santa Clara on Sunday.

Federal authorities are deploying bomb-detection experts, SWAT teams and undercover agents outside Levi's Stadium. As many as 60 federal, state and local agencies are involved in Super Bowl security, officials estimated.

The FBI opened a multi-agency command post last week that will be continuously staffed through Sunday. The bureau said about 20 different federal, state and local law enforcement agencies will man the command post.